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Finding the Fourth Proportional to 74,940.99, 112,355.89 and 45,351.79

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Solution

The fourth proportional to 74,940.99, 112,355.89 and 45,351.79 is: 67,994.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,940.99 : 112,355.89 = 45,351.79 : x
  2. Step 2: Convert to fraction form
    74,940.99/112,355.89 = 45,351.79/x
  3. Step 3: Cross multiply
    74,940.99x = 112,355.89 × 45,351.79
  4. Step 4: Simplify right side
    74,940.99x = 5,095,540,728.54
  5. Step 5: Solve for x
    x = 5,095,540,728.54/74,940.99
  6. Step 6: Final answer
    x = 67,994.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.